| Identification | Back Directory | [Name]
Endosulfan I | [CAS]
959-98-8 | [Synonyms]
β-osulfan
β-Thiodane
endosulfan1
endosulfana
α-Benzoepin
α-Endosulfan
ENDOSULFAN I
'LGC' (1119)
beta-thionex
A-ENDOSULFAN
alpha-Thiodan
ALPHA-BENZOEPIN
ALPHA-ENDOSULFAN
ENDOSULPHANALPHA
Endosulfan alpha
ALPHA-ENDOSULPHAN
a-endosulfan-alpha
endosulfani(alpha)
Endosulfan Impurity 5
α-Endosulfan solution
α-Endosulfan in Benzene
Endosulfan I (α isomer)
ENDOSULFAN (ALPHA ISOMER)
ENDOSULFAN I (ALPHA ISOMER)
a-Endosulfan 100mg [959-98-8]
Endosulfan I @10 μg/mL in MtBE
EndosulfanISolution,100mg/L,1ml
Endosulfan I @1000 μg/mL in MeOH
ENDOSULFAN 1 (ALPHA), 25MG, NEAT
ALPHA-ENDOSULFAN PESTANAL, 100 MG
Endosulfan I@1000 μg/mL in Acetone
Endosulfan I @100 μg/mL in Methanol
ENDOSULFAN (ALPHA ISOMER), 100MG, NEAT
alpha-Endosulfan @1000 μg/mL in p-Dioxane
α-Endosulfan Solution in Hexane, 1000μg/mL
Endosulfan (alpha isomer) 100mg [959-98-8]
endosulfan (alpha isomer) (bsi,iso,ansi,esa)
1,4,5,6,7,7-hexachloro-,cyclicsulfite,endo-5-norbornene-3-dimethanol
endo-1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dimethanol cyclic sulfite
5-Norbornene-2,3-dimethanol, 1,4,5,6,7,7-hexachloro-, cyclic sulfite, endo-
ALPHA-1,4,5,6,7,7-HEXACHLOROBICYCLO[2.2.1]-5-HEPTENE-2,3-BIS-(METHYLENE)-SULFITE
6,9-methano-2,4,3-benzodioxathiepin,6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-,3-oxide,(3α,5aβ,6α)
6,7,8,9,10,10-HEXACHLORO-1,5,5A,6,9,9A-HEXAHYDRO-6,9-METHANO-2,4,3-BENZODIOXATHIEPIN-3-OXIDE, ALPHA ISOMER
6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide, (3α,5aβ,6α,9α,9aβ)-
6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide, (3alpha,5abeta,6alpha,9alpha,9abeta)-
6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide, (3alpha,5aalpha,6alpha,9alpha,9aalpha)-
6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide, (3.alpha.,5a.beta.,6.alpha.,9.alpha.,9a.beta.)- | [EINECS(EC#)]
625-034-9 | [Molecular Formula]
C9H6Cl6O3S | [MDL Number]
MFCD00151174 | [MOL File]
959-98-8.mol | [Molecular Weight]
406.93 |
| Chemical Properties | Back Directory | [Appearance]
Endosulfan is a chlorinated cyclodiene insecticide. The pure product is a colorless crystalline solid. The technical product is a light to dark brown waxy solid. It has a
rotten egg or sulfur odor. | [Melting point ]
109°C | [Boiling point ]
449.7±45.0 °C(Predicted) | [density ]
1.94 | [vapor pressure ]
4.58 x 10-5 mmHg at 25 °C (subcooled liquid vapor pressure calculated from GC retention time data,Hinckley et al., 1990) | [Fp ]
-26 °C | [storage temp. ]
APPROX 4°C
| [solubility ]
Chloroform: Slightly soluble; DMSO: Slightly soluble; Methanol: Slightly soluble | [form ]
neat | [Water Solubility ]
(mg/L):
0.51 at 20 °C (shake flask-GC, Bowman and Sans, 1983)
0.53 at 25 °C (extraction-GLC, Weil et al., 1974) | [BRN ]
2950316 | [Henry's Law Constant]
0.266 at 5 °C, 0.464 at 15 °C, 0.711 at 20 °C, 0.809 at 25 °C, 1.09 at 35 °C; in 3% NaCl solution:1.07 at 5 °C, 2.08 at 15 °C, 4.71 at 25 °C, 6.71 at 35 °C (gas stripping-GC, Cetin et al., 2006) | [Exposure limits]
ACGIH TLV: TWA 0.1 mg/m3. | [Stability:]
Light Sensitive | [NIST Chemistry Reference]
Endosulfan i(959-98-8) | [EPA Substance Registry System]
6,9-Methano-2,4, 3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1, 5,5a,6,9,9a-hexahydro-, 3-oxide, (3.alpha.,5a.beta.,6.alpha., 9.alpha.,9a.beta.)-(959-98-8) |
| Hazard Information | Back Directory | [Chemical Properties]
Endosulfan is a chlorinated cyclodiene insecticide. The pure product is a colorless crystalline solid. The technical product is a light to dark brown waxy solid. It has a
rotten egg or sulfur odor. | [General Description]
Brown crystals. | [Air & Water Reactions]
Insoluble in water. Slowly hydrolyzes to form sulfur dioxide and diol; hydrolyzes more rapidly under basic or acidic conditions. | [Reactivity Profile]
Endosulfan I is an organochlorine, cyclodiene derivative. Also a sulfite ester. Incompatible with strong oxidizing and reducing agents. Also incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides. As an ester Endosulfan I will hydrolyze to form sulfur dioxide and a diol; reaction is more rapid under basic conditions. | [Health Hazard]
ACUTE/CHRONIC HAZARDS: Highly toxic by ingestion, inhalation, and skin absorption. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways. | [Potential Exposure]
Those engaged in the manufacture,
formulation, and application of this material | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Speed in removing material from skin
is of extreme importance. Shampoo hair promptly ifcontaminated. Seek medical attention immediately. If this
chemical has been inhaled, remove from exposure, begin
rescue breathing (using universal precautions, including
resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility. When this chemical has been swallowed, get medical attention. Consult hospital or poison control center on
use of antidotes. Transport to healthcare facility | [Shipping]
UN2761 Organochlorine pesticides, solid, toxic,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1;
Labels: 6.1-Poisonous materials, Technical Name Required. | [Incompatibilities]
Those engaged in the manufacture,
formulation, and application of this material | [Waste Disposal]
A recommended method for
disposal is burial 18 in deep in noncropland, away from
water supplies, but bags can be burned. Large quantities
should be incinerated at high temperature in a unit with
effluent gas scrubbing. Consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Generators of waste containing this contaminant (≥100 kg/
mo) must conform with EPA regulations governing storage,
transportation, treatment, and waste disposal. In accordance
with 40CFR165, follow recommendations for the disposal
of pesticides and pesticide containers. Must be disposed
properly by following package label directions or by contacting your local or federal environmental control agency,
or by contacting your regional EPA office. | [Physical properties]
Colorless to brown crystals or flakes with a mild odor similar to terpene or sulfur dioxide. | [Uses]
Insecticide for vegetable crops. | [Environmental Fate]
Soil. Metabolites of endosulfan identified in soils were endosulfandiol (1,4,5,6,7,7-
hexachlorobicyclo[2.2.1]hept-5-ene-2,3-dimethanol), endosulfan ether, endosulfan lactone
(4,5,6,7,8,8-hexachloro-1,3,3a,4,7,7a-hexahydro-4,7-methane-isobenzofuran-1-one) and
endosulfan sulfate (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,3,4-
benzodioxathiepin-3,3-dioxide) (Martens, 1977; Dreher and Podratzki, 1988). These compounds,
including endosulfan ether, were also reported as metabolites identified in aquatic
systems (Day, 1991). Endosulfan sulfate was the major biodegradation product in soils
under aerobic, anaerobic and flooded conditions (Martens, 1977). In flooded soils, endolactone
was detected only once whereas endodiol and endohydroxy ether were identified in
all soils under these conditions. Under anaerobic conditions, endodiol formed in low
amounts in two soils (Martens, 1977).
Indigenous microorganisms obtained from a sandy loam degraded a-endosulfan to
endosulfandiol. This diol was converted to endosulfan a-hydroxy ether and trace amounts
of endosulfan ether and both were degraded to endosulfan lactone (Miles and Moy, 1979).
Using settled domestic wastewater inoculum, a-endosulfan (5 and 10 mg/L) did not
degrade after 28 days of incubation at 25°C (Tabak et al., 1981).
Plant. Endosulfan sulfate was formed when endosulfan was translocated from the
leaves to roots in both bean and sugar beet plants (Beard and Ware, 1969). In tobacco
leaves, a-endosulfan is hydrolyzed to endosulfandiol (Chopra and Mahfouz, 1977). Stewart
and Cairns (1974) reported the metabolite endosulfan sulfate was identified in potato peels
and pulp at concentrations of 0.3 and 0.03 ppm, respectively. They also reported that the
half-life for the conversion of a-endosulfan to b-endosulfan was 60 days. On apple leaves,
direct photolysis of endosulfan by sunlight yielded endosulfan sulfate (Harrison et al.,
1967).
In carnation plants, the half-lives of a-endosulfan stored under four different conditions,
non-washed and exposed to open air, washed and exposed to open air, non-washed
and placed in an enclosed container and under greenhouse conditions were 6.79, 6.38,
10.45 and 4.22 days, respectively (Céron et al., 1995).
Surface Water. Endosulfan sulfate was also identified as a metabolite in a survey of
11 agricultural watersheds located in southern Ontario, Canada (Frank et al., 1982). When
endosulfan (a- and b- isomers, 10 mg/L) was added to Little Miami River water, sealed
and exposed to sunlight and UV light for 1 week, a degradation yield of 70% was observed.
After 2 and 4 weeks, 95% and 100% of the applied amount degraded. The major degradation
product was identified as endosulfan alcohol by IR spectrometry (Eichelberger and
Lichtenberg, 1971).
Photolytic. Thin films of endosulfan on glass and irradiated by UV light (l >300 nm)
produced endosulfandiol with minor amounts of endosulfan ether, a lactone, an a-hydroxyether
and other unidentified compounds (Archer et al., 1972). When an aqueous solution
containing endosulfan was photooxidized by UV light at 90–95°C, 25, 50 and 75%
degraded to carbon dioxide after 5.0, 9.5 and 31.0 hours, respectively (Knoevenagel and
Himmelreich, 1976).
Chemical/Physical. Endosulfan slowly hydrolyzes forming endosulfandiol and
endosulfan sulfate (Kollig, 1993; Martens, 1976; Worthing and Hance, 1991). The hydrolysis
rate constant for a-endosulfan at pH 7 and 25°C was determined to be 3.2 ′ 10–3/hour,
resulting in a half-life of 9.0 days (Ellington et al., 1988). The hydrolysis half-lives are
reduced significantly at varying pHs and temperature. At temperatures (pH) of 87.0 (3.12),
68.0 (6.89) and 38.0°C (8.69), the half-lives were 4.3, 0.10 and 0.08 days, respectively
(Ellington et al., 1986). Greve and Wit (1971) reported the hydrolysis half-lives of a-
endosulfan at 20°C and pH values of 7 and 5.5 were 36 and 151 days, respectively.
Emits toxic fumes of chlorides and sulfur oxides when heated to decomposition (Lewis,
1990). |
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